summaryrefslogtreecommitdiff
path: root/fs/jfs/endian24.h
diff options
context:
space:
mode:
Diffstat (limited to 'fs/jfs/endian24.h')
-rw-r--r--fs/jfs/endian24.h49
1 files changed, 49 insertions, 0 deletions
diff --git a/fs/jfs/endian24.h b/fs/jfs/endian24.h
new file mode 100644
index 000000000000..ab7cd0567c95
--- /dev/null
+++ b/fs/jfs/endian24.h
@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) International Business Machines Corp., 2001
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
+ * the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#ifndef _H_ENDIAN24
+#define _H_ENDIAN24
+
+/*
+ * endian24.h:
+ *
+ * Endian conversion for 24-byte data
+ *
+ */
+#define __swab24(x) \
+({ \
+ __u32 __x = (x); \
+ ((__u32)( \
+ ((__x & (__u32)0x000000ffUL) << 16) | \
+ (__x & (__u32)0x0000ff00UL) | \
+ ((__x & (__u32)0x00ff0000UL) >> 16) )); \
+})
+
+#if (defined(__KERNEL__) && defined(__LITTLE_ENDIAN)) || (defined(__BYTE_ORDER) && (__BYTE_ORDER == __LITTLE_ENDIAN))
+ #define __cpu_to_le24(x) ((__u32)(x))
+ #define __le24_to_cpu(x) ((__u32)(x))
+#else
+ #define __cpu_to_le24(x) __swab24(x)
+ #define __le24_to_cpu(x) __swab24(x)
+#endif
+
+#ifdef __KERNEL__
+ #define cpu_to_le24 __cpu_to_le24
+ #define le24_to_cpu __le24_to_cpu
+#endif
+
+#endif /* !_H_ENDIAN24 */